Question # 1

The real or imaginary surface separating the system from the surrounding is called

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Imaginary line

Boundary

Real line

All of above

Work is a

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State function

Only function

Non-state function

State

The subject matter of first law of thermochemistry is based on:

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First law of Themochemistry.

First law of Thermodynamics.

Second law of Themochemistry.

Second law of Thermodynamics.

The reaction of zinc with the copper sulfate solution is an example of.

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Oxidation reduction reaction.

Spontaneous reaction.

Spontaneous redox reaction.

Non-spontaneous reaction.

The net heat change in a chemical reaction is same, whether it is brought about in two or more different ways in one or several steps. It is known as:

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Henry's law.

Joule's principle.

Hess's law.

Law of conservation of energy.

When a piece of zinc is added to the copper sulphate solution, _______ colour of solution disappear

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Pink

Purple

Blue

Brown

The subject matter of first law of thermochemistry is based on

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First law of Thermochemistry

First law of Thermodynamics

Second law of Thermochemistry

Second law of Thermodynamics

A reaction will also be called a spontaneous if :

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It does no need energy to start with.

It needs energy to carry the whole process.

It needs energy at the end of reaction.

It needs energy to stat with.

When a system absorbs energy, the sign of delta E is

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Neither positive nor negative

Negative

Positive

None of above

Which of the following statements is contrary to the first law of thermodynamics?

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Energy can neither be created no destroyed.

One form of energy can be transferred into an equivalent amount of the kinds of energy.

In a adiabatic process, the work done is independent of its path.

Continuous production of mechanical work without supplying an equivalent amount of heat is possible.

For a given process, the heat changes at constant volume ( q_v)are related to other as:

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q_p= q_v

q_p<q_v

q_p>q_v

q_p=q_v/2

If an endothermic reaction is allowed to take place very rapidly in the air, the temperature of the surrounding air

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remains constant

increases

decreases

remain unchanged

The reaction of Zinc with copper sulphate solution is an example of

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Oxidation reduction reaction

Spontaneous reaction

Spontaneous redox reaction

Non-spontaneous reaction

A process which takes place on its own without any outside assistance and moves from a non-equilibrium state towards an equilibrium state is termed as

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Spontaneous process

Natural process

Non-spontaneous process

Both a and b

Burning of coal and hydrocarbon in air are examples of :

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Non-spontaneous reaction.

Spontaneous reaction.

Natural reaction

Both (a) and (C)

One mole of oxygen confined in a cylinder fitted with a piston is an example of

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Surrounding

System and surrounding

System

State function

By comparing both initial and final states of the system, we can describe the change taking place in the

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Surrounding

Both a and c

System

None of above

The study of heat changes accompanying a chemical reaction is known as

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Thermochemistry

Biochemistry

Physical chemistry

Analytical chemistry

A process which takes place on its own without any outside assistance and moves from a non-equilibrium stat towards an equilibrium stat is termed as:

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Spontaneous process.

Natural process.

Non-Spontaneous process.

Both (a) and (b).

Which one of the following is not related to spontaneous process

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Unidirectional

Real

Irreversible

Artificial

Reaction between Zn and CuSO₄can be called a system under

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Surrounding

Observation

system

None of above

Calorie is equivalent to :

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0.4184 J

4184 J

4.184 J

418.4 J

A reaction will also be called a spontaneous if

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It does not need energy to start with

It needs energy to carry the whole process

It needs energy at the end of reaction

It needs energy to start with

Enthalpy of neutralization of all the strong acids and strong bases has the same value because:

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Neutralization leads to the formation of salt and water.

Strong acids and bases are ionic substances.

Acids always give rise to H⁺ions and bases always furnish OH^-ions.

The net chemical change involve the combination of H⁺ and OH^-ions to form water.

Which of the following statements is contrary to the first law of themodynamics

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Energy can neither be created nor destroyed

One form of energy can be transferred into an equivalent amount of other kinds of energy

In an adiabatic process, the work done is independent of its path

Continuous production of mechanical work without supplying and equivalent amount of heat is possible

In endothermic reactions, the heat contents of the:

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Products equal to the reactants.

Reactants more than that of products.

Products more than that of reactants

Both (b) and (c)

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